JP3213479B2 - Pin device for assembled thermal insulation box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pin device for an assembled heat insulating box for connecting heat insulating panels constituting an assembled heat insulating box such as a prefabricated refrigerator-freezer.

[0002]

2. Description of the Related Art A pin device for an assembling heat insulating box of this type is disclosed, for example, in Japanese Patent Publication No. Hei 6-27612 (F25D2).
3/06), and is used for the prefabricated refrigerator-freezer 01 shown in FIG. The prefabricated refrigerator-freezer 01, which is an assembled heat insulating box, has a refrigerator room 02 as a storage room on the left side and a refrigerator room 03 as a storage room at a lower temperature than the refrigerator room 02 on the right side. This refrigerator room 02
The ceiling wall and the side wall are formed by connecting a plurality of heat insulation panels 06 having a thickness of 50 mm, and connecting a plurality of heat insulation panels 07 having a thickness of 100 mm thicker than the heat insulation panel 06 in the freezer compartment 03. .

In the lower part of the refrigerator compartment 02, a heat-insulating 50 mm thick floor panel 09 is laid on a skid 08 as a floor plate, while in the lower part of the freezer compartment 03, a skid 010 is provided.
A 100 mm thick floor panel 011 thicker than the floor panel 09 is laid thereon. In consideration of the difference between the inside temperature of the refrigerator compartment 02 and the inside temperature of the freezer compartment 03 in this manner, the heat insulation panel 07 and the floor panel 01 of the freezer compartment 03 are taken into consideration.
1 has a larger thickness than that of the refrigerator compartment 02.

[0004] Openings are formed in the front of the refrigerating compartment 02 and the freezing compartment 03 of the prefabricated refrigerator-freezer 01, respectively, and doors 013 and 014 for operators are provided in the openings so as to be openable and closable.

[0005] The prefabricated refrigerator-freezer 01 has two or more storage chambers having different temperatures as described above, which are constituted by insulating panels having different thicknesses, and a plurality or one of the storage chambers has the same thickness. There is the one which is constituted by.

FIG. 12 shows a hook device F and a pin device P used in a prefabricated refrigerator-freezer 01 which is generally used and has a heat insulating panel of the same thickness. A hook 020 is rotatably provided in the hook device F, and a single pin 023 is fixed to the pin device P in a pin support case 022 made of synthetic resin. Further, there is also a type in which a pin support case is configured by abutting a pair of sheet metal processed iron plates.

On the other hand, in a prefabricated refrigerator-freezer 01 composed of heat-insulating panels having different thicknesses, the heat-insulating panels 06 in the refrigerator compartment 02 and the heat-insulating panels 07 in the freezer compartment 03 are connected as shown in FIG. Insulation panel 0
The height of the floor panels 09 and 011 on which 6,07 are placed is the same as the height of the floor panels 09 and 01, and the case where the heat insulation panels 06 of the refrigerator compartment 02 and the heat insulation panels 07 of the freezer compartment 03 are connected. 07 on which floor panel 09,01
There are two cases where the heights of 1 are different from each other.

Therefore, it is possible to change the relative height between the hook device F and the pin device P in accordance with the height of the floor panels 09 and 011. Different insulation panels must be manufactured, which makes production management and inventory management difficult.

Therefore, a pin device P as shown in FIGS. 13 and 14 is employed. This pin device P
The pin support case 026 is formed in a box shape having an open surface facing the hook device F by sheet metal working, and two pins 028 and 029 are fixed to the pin support case 026 by caulking. Also, this pin support case 02
L-shaped mounting brackets 031 and 032 are spot-welded to the upper and lower portions of 6, and the mounting brackets 031 and 032 are screwed to a PVC frame 034 of the heat insulating panel.

When the heat insulating panel 041 and the heat insulating panel 042 are connected by the pin device P and the hook device F, the heat insulating panel 041 provided with the hook device F and the pin device P are provided in FIG. Heat insulation panel 0
42 are placed on the floor panel at the same height, the hook 020 engages the upper first pin 028.
On the other hand, when the heat insulating panel 041 and the heat insulating panel 042 are placed on floor panels of different heights, the hook 0
20 is engaged with the lower second pin 029. With this configuration, when manufacturing the heat insulating panel, it is possible to manufacture the heat insulating panel having the same mounting position of the pin device P and the hook device F without changing the relative height between the pin device P and the hook device F. It becomes possible.

[0011]

Therefore, conventionally,
A pin device P, to which a single pin 023 shown in FIG. 12, which is usually used, is fixed, and a pin device P shown in FIG. 13, which is used for a prefabricated refrigerator-freezer 01 composed of heat insulating panels having different thicknesses. There are two types of fixed pins 028 and 029, and these two types are prepared and used properly. Providing two types of pin devices P in this way requires time and effort in the production and management of components. Therefore, in order to use one type of pin device P, the pin device P shown in FIG. 13 to which two pins are fixed is used also in a prefabricated refrigerator-freezer generally used with a heat insulating panel having the same thickness. However, since the pin device P shown in FIG. 13 is made of sheet metal and has a simple box shape, the strength against pressure when a heat insulating material such as urethane foams is low, and There is a drawback that gas release during foaming of the heat insulating material is not so good.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a heat insulating box composed of heat insulating panels of different thicknesses and a normal heat insulating box composed of heat insulating panels of the same thickness. An object of the present invention is to provide a pin device for an assembling heat-insulating box, which can be used for both the heat-insulating body and the gas-insulating material when used for a normal heat-insulating box, and has good degassing.

[0013]

According to the pin device for an assembling heat insulating box of the present invention, a hollow panel is formed by a pair of face members facing each other at an interval, and a gap is formed around a peripheral portion of the hollow panel. After the pin device or the hook device is disposed, the heat insulating panel formed by injecting and foaming the heat insulating material into the internal space of the hollow panel is connected to each other, and one surface for hook intrusion is provided. A pin support case made of synthetic resin having an opening formed therein is provided with a pin support case for connecting with an adjacent heat insulating panel when the adjacent heat insulating panel is placed on a floor panel of the same height. The first pin is fixed, and is formed to connect with the adjacent heat insulating panel when the adjacent heat insulating panel is placed on the floor panel of different height, and the inner diameter is smaller than the outer diameter of the first pin. small, In which vent holes for inserting the screw is provided.

[0014]

[0015]

[0016]

In the case where the heat-insulating box is composed of heat-insulating panels of the same thickness, the heat-insulating panel is manufactured without inserting a wood screw into the vent hole of the pin device, and the heat-insulating material foams when the heat-insulating panel is manufactured. The gas generated at this time is discharged to the outside through the vent hole. On the other hand, when the heat-insulating box is composed of heat-insulating panels having different thicknesses, a wood screw is inserted into the vent hole of the pin device to manufacture the heat-insulating panel, and the adjacent heat-insulating panels are mounted on floor panels of different heights. Even when placed on the panel, the hooks of the hook device can be engaged with the wood screws to connect the adjacent heat insulating panels.

[0017]

[Embodiment] Next, an embodiment of a pin device for an assembling heat insulating box according to the present invention will be described with reference to FIGS. FIG. 1 is a partially cutaway front view of an embodiment of a pin device and a hook device for an assembled heat insulating box according to the present invention. 2A and 2B are views for explaining a state before assembling the pin device, wherein FIG. 2A is a plan view and FIG. 2B is a front view. FIG. 3 is an explanatory view of a pin device and an opening for the pin device.
(A) is a view of the opening of the PVC frame, (b) is a side view of the pin device, (c) is a front view of the pin device, and (d) is a plan view of the pin device. 4A and 4B are cross-sectional views of the pin device, FIG. 4A is a cross-sectional view taken along line AA of FIG. 3C, and FIG.
It is -B sectional drawing.

FIGS. 5A and 5B show a state in which a seal is attached to the pin device P, wherein FIG. 5A is a plan view and FIG. 5B is a front view.
FIG. 6 is a front view of a state where the pin device is connected to the PVC frame.
(A) is an overall view and (b) is an enlarged view of a main part. FIG. 7 is a view for explaining a method of connecting the pin device and the PVC frame,
(A) is a perspective view before coupling, and (b) is a principal part perspective view immediately before coupling. FIG. 8 is a plan sectional view of FIG. Fig. 9 is a partially cutaway front view of a prefabricated refrigerator-freezer composed of heat insulating panels having different thicknesses. FIG. 10 is a front view of the pin device and the hook device in FIG.

The hook storage case 1 of the hook device F shown in FIG. 1 is integrally formed of an elastic synthetic resin material such as ABS resin. Before the hook storage case 1 is assembled, as shown in FIG. 2, the hook storage case 1 includes a pair of rectangular support plates 2 and 3 and a flexible connecting portion 5 connecting one end of the support plates 2 and 3. . The connecting portion 5 has an elongated band shape and connects one side of the support plates 2 and 3 continuously over the entire length of the side. Walls 6 perpendicular to the support plate 2 are formed at the upper and lower portions at the left end of the left support plate 2, respectively. Locking holes 7 and 8 serving as locking portions are formed on the wall surface 6 so as to protrude outward (to the left in the figure). On the other hand, the upper and lower right end portions of the right support plate 3 are provided with engaging claws 10 and 11 serving as engaging portions.
Are respectively formed. The support plate 2 has a bearing hole 1.
3, a support recess 3 is formed in the support plate 3, and a reinforcing rib 15 is provided around the recess.

At the upper and lower ends of the support plate 2, two elongated vertical plates 16 are formed along the ends. A pair of slightly shorter ridges 18 are formed between the vertical plates 16. Similarly, a vertical plate 19 is provided at the upper and lower ends of the support plate 3.
Are formed three each. The engaging claws 10, 1
1 is formed integrally with the innermost vertical plate 19. Further, a stopper 21 for storing and a stopper 23 for preventing protrusion are formed on the support plate 3 so as to protrude.
The protrusion preventing stopper 23 is integrally formed with the innermost vertical plate 19 in a state of being connected to the innermost vertical plate 19, and has a structure of mutually reinforcing.

The hook storage case 1 is bent by using the connecting portion 5 as a fold so that the support plate 2 and the support plate 3 are opposed to each other, and the pair of engaging claws 10 and 11 are engaged with the locking holes 7 and 8. Used to be used. An end of the hook storage case 1 facing the connecting portion 5 is provided between the wall surface 6 of the support plate 2 and the hook opening 2.
5 (see FIG. 1) are formed. A screw hole 27 is formed on the upper wall surface 6, and a screw hole 27 and a projection 28 for positioning are formed on the lower wall surface 6.

The hook device F is incorporated in the heat-insulated prefabricated panel. The hook storage case 1 is bent so that a heat-insulating material such as urethane (synthetic resin material) does not enter the inside of the hook storage case 1 when the heat-insulated prefabricated panel is manufactured. In this state, the vertical plates 16 and 19 overlap each other with a small gap. This vertical plate 16,1
9 and a hook hole 25 and a screw hole 27
Is degassed.

In FIG. 1, the rotor 3 of the hook device F
Reference numeral 1 denotes a hexagonal hole formed of an elastic synthetic resin such as polyacetal, the eccentric shaft 33 of which is rotatably supported by the bearing hole 13 and the bearing recess 14 and into which a handle lever is removably inserted. 34 are formed. An engaging portion 38 is formed on the outer peripheral portion of the rotor 31 so as to protrude outward.

The hook member 41 of the hook device F is made of metal such as iron, and is rotatably supported by the body of the rotor 31 having a circular cross section. On the surface of the hook member 41, a pulling-side stopper 43 and a loosening-side stopper 44 that come into contact with the engaging portion 38 are provided in a protruding manner.

The rotor 31 and the hook member 41 are attached to the hook storage case 1 in an open state in advance, and then the connecting portion 5 is bent as a fold so that the engaging claws 10, 1 are bent.
1 is engaged with the locking holes 7 and 8, and the hook device F is manufactured. Since the locking holes 7 and 8 protrude outward as described above, a protrusion is formed in the hook device F.
The projecting portion of the hook device F is inserted into a square hole of the PVC frame 46 (synthetic resin frame) by an automatic insertion device such as a robot. And, the locking holes 7 protruding from the square holes which are the fixing holes,
8 is melted and crushed by the heater, and the hook device F is attached to the PVC frame 46.

3 and 4, the pin support case 51 of the pin device P is integrally formed of synthetic resin, and has a groove 52 formed therein as shown in FIG.
The left end of the hook has an elongated hook entry opening 53 (FIG. 3B).
(See reference). The left end face and the right end face of the pin support case 51 are each provided with a flange 5.
5, 56 are formed, and a total of four ribs 58 arranged horizontally are formed on the front and back surfaces. Screw holes 61 are formed at the upper end and the lower end of the left flange 55. Below the upper screw hole 61, a gas venting cylinder 62 is formed horizontally and vertically to the flanges 55 and 56, and a left end thereof is formed with a protruding portion 63 protruding from the flange 55. A bulge 64 formed at the position of AA
Is formed with a circular hole 65 for a pin, a metal first pin 67 is press-fitted, and both ends thereof are caulked and fixed. The bulging portion 68 formed at the position BB has a circular vent hole 6 having a smaller opening cross section than the hole 65.
9 are formed. Further downward, a projection 7 having a circular cross section
1 is formed so as to protrude from the flange 55.

In FIG. 1, the pin supporting case 51 has a
6 abuts. As shown in FIG. 3A, the PVC frame 76 has a mounting hole 81 at a position corresponding to the screw hole 61 of the pin support case 51, and a circular first engaging member at a position of the protrusion 63 in the same manner. The stop hole 82 is provided in the hook entry opening 53.
, And a second locking hole 84 is formed at the position of the projection 71.

On the other hand, in FIG.
A seal member 86 (shown by hatching in the figure) for preventing the penetration of the heat insulating material is attached so as to cover the hook entry opening 53 (see FIG. 3B) and the gas vent hole 69. In the figure, the thickness of the sealing material 86 is larger than the actual thickness for easy understanding. In other drawings, the sealing material 86 is omitted.

In FIG. 7, the pin supporting case 51 on which the sealing material 86 is stretched has a projection 63 and a projection 71.
Are respectively fitted in the first locking hole 82 and the second locking hole 84 of the PVC frame 76, and as shown in FIG.
3 and the tip of the projection 71 project outward from the surface of the PVC frame 76. This mounting operation is performed by an automatic device such as a robot. Then, the forked heater H shown in FIG.
As a result, the tips of the projecting portion 63 and the projecting portion 71 are melted and crushed, and are enlarged as shown in FIG. 6B, whereby the pin support case 51 is attached to the PVC frame 76.
In addition, even if it is attempted to mount the pin support case 51 in the opposite direction, it is impossible to mount the first support hole 82 and the projection 63 because the sizes of the mounting hole 81 and the projection 71 are different. is there.

When the pin device P is mounted on the PVC frame 76, the flange 55 on the contact side of the pin support case 51
Are in point contact with the surface of the PVC frame 76 instead of point contact, so that the strength can be improved.

As described above, since the mounting hole 81 is formed in the PVC frame 76 at a position corresponding to the screw hole 61 of the pin support case 51, the PVC frame 76 may be dropped or impacted during work or transportation. If, for example, the connection with the PVC frame 76 due to the molten portion is released, the fixing can be performed with screws.

In this manner, the hook device F is connected to the PVC frame 46.
When the pin device P is attached to the PVC frame 76, a rectangular surface material 9 such as a stainless steel plate or a steel plate can be prepared.
1 (see FIG. 8) are spaced apart from each other to form a hollow panel, and the gap between each side of the hollow panel is set to the PVC frame 4 to which the hook device F or the pin device P is attached.
6 and 76, and a heat insulating material 93 such as urethane is injected into the internal space and foamed to produce a heat insulating panel. Degassing of the pin device P is performed from the degassing cylinder 62 and the degassing hole 69.

Next, the operation of the hook device for a prefabricated panel having the above configuration will be described. In FIG.
When the handle lever is inserted into the hole 34 of the eccentric shaft 33 of the rotor 31 and the rotor 31 is rotated clockwise or counterclockwise, the hook member 4 is rotated in the same manner as the conventional hook device.
1 can be rotated between a protruding position where the hook member 41 is illustrated and a storage position where the hook member 41 contacts the storage stopper 21 of the hook storage case 1. Then, when the heat insulating panel provided with the hook device F and the heat insulating panel provided with the pin device P are placed on the same heat insulating floor panel, the hook member 41 is engaged with the first pin 67. The heat insulation panels can be connected together. The gap between the heat insulating panels is closed by a packing 94 (see FIG. 8).

FIG. 9 shows a case where the heat insulating panel provided with the hook device F and the heat insulating panel provided with the pin device P are mounted on heat insulating floor panels having different heights. In this figure, the skid 96 is the base 9
5 is laid. The 50 mm thick heat insulating panel 97 provided with the hook device F is mounted on a 50 mm thick heat insulating floor panel 98 provided on the skid 96. On the other hand, the heat insulating panel 99 having a thickness of 100 mm provided with the pin device P is mounted on a heat insulating floor panel 100 having a thickness of 100 mm similarly provided on the skid 96.
Therefore, a difference of 50 mm occurs between the lower end of the heat insulating panel 97 and the lower end of the heat insulating panel 99, and the relative position between the hook device F and the pin device P is 50 mm as compared with the case shown in FIG.
Will be in different positions.

In the case as shown in FIG. 9, when manufacturing the heat insulating panel 99 provided with the pin device P, the wood screw 102 as the second pin is previously inserted into the gas vent hole 69.
After screwing and fixing, heat insulating material is injected and foamed into the hollow panel. Although the operation of inserting and fixing the first pin 67 into the hole 65 is performed in the manufacturing process of the pin device P,
The step of inserting the wood screw 102 into the gas vent hole 69 is performed in the step of manufacturing a heat insulating panel.

The heat insulation panel 97 and the heat insulation panel 99
The connection is made by engaging the hook member 41 of the hook device F with the wood screw 102 of the pin device P. Therefore, the vent hole 69 is provided in the heat insulating floor panel 9.
8 and the heat insulating floor panel 100 are disposed below the first pin 67 by a distance substantially equal to the thickness difference. FIG.
0, the flange 55 which is the contact surface with the PVC frame 76
Is configured to be substantially equal to the distance between the surface of the flange 55 and the first pin 67.
In other words, the distance between the center of the first pin 67 and the center of the vent hole 69 is set substantially equal to the difference in the thickness of the heat insulating floor panel, while the center of the first pin 67 and the center of the vent hole 69 are set. Is set substantially parallel to the contact surface of the pin device P that contacts the PVC frame 76, that is, the opposing surface that opposes the hook device F.

The first pin 67 may or may not be used when connecting the heat insulating panel.
It is fixed to all pin devices P regardless of use or non-use. On the other hand, the wood screw 102 does not need to be inserted into the vent hole 69 in the case of a prefabricated refrigerator having a heat insulating panel of the same thickness that is commonly used.

In the embodiment, flanges 55 and 56 and ribs 58 as strength members are provided on the pin support case 51.
(In particular, the flange 55 and the rib 58) are integrally formed of synthetic resin, and the pin support case 51 has considerable strength. As a result, it is possible to maintain the strength against the pressure when the heat insulating material such as urethane foams without inserting and fixing the pin which is both the engaging member with the hook and the reinforcing member into the gas vent hole 69. it can.

On the other hand, since the conventional sheet metal processing pin device P shown in FIG. 13 has a simple box shape from the beginning, it has low strength against pressure when a heat insulating material such as urethane foams. In addition, when a pin serving as a strength member is removed, the strength is further reduced, and the heat insulating material may be crushed at the time of foaming. As a result, it is impossible to remove the second pin 029 shown in FIG. It is also conceivable to attach a reinforcing member to increase the strength. However, attaching the reinforcing member by spot welding to a sheet-metal processed member considerably increases the number of parts and the number of manufacturing steps, and increases the cost.

The wood screw 102 is commercially available at a low cost, and the cost can be reduced. Further, since the inner diameter of the gas vent hole 69 is smaller than the outer diameter of the first pin 67, the strength of the pin support case 51 can be ensured despite the formation of the gas vent hole 69, and 6
Degassing during foaming of the heat insulating material can be favorably performed even if 9 is small.

Further, since the pin support case 51 is formed of a synthetic resin, the projection 63 and the projection 71, which are the engagement projections to be attached to the PVC frame 76, are formed at the same time when the pin support case 51 is formed. be able to.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications may be made within the scope of the present invention described in the appended claims. It is possible to make changes. Modified embodiments of the present invention will be exemplified below. (1) In the embodiment, the thickness of the heat insulating panel is two types, but three or more types are also possible. In the case of three types, gas vent holes into which pins can be inserted are provided at two places.

(2) In the embodiment, a PVC frame is used, but the material thereof can be appropriately changed, and for example, another synthetic resin frame, a metal frame, or the like can be used.

(3) In the embodiment, the tip of the protruding portion is melted and expanded by the heater, but it can be welded to the frame. Although the heater H has a columnar shape, its shape and the like can be changed as appropriate, and for example, it can be a plate shape. Furthermore, without using the heater H, it is also possible to press the tip of the cylindrical rod as the pressing tool against the tip of the protrusion and slide, for example, rotate the tip to melt the tip of the protrusion by the frictional heat. . (4) In the embodiment, a wood screw 10 is used as the second pin.
2, but other pins, such as bolts, can also be used.

[0045]

The pin device of the present invention can be used for both the case where the heat insulating box is constituted by heat insulating panels having the same thickness and the case where the heat insulating panel is constituted by heat insulating panels having different thicknesses. Therefore, it is not necessary to prepare various pin devices for manufacturing the heat insulating panel.

Wood screws are commercially available at low cost, and the cost can be reduced. Further, the inner diameter of the gas vent hole is smaller than the outer diameter of the first pin, and since the hole is small, the strength of the pin support case can be secured despite the hole being formed, and this gas The vent holes can improve the gas release during foaming of the heat insulating material.

[0047]

[0048]

[0049]

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of an embodiment of a pin device and a hook device for an assembled heat insulating box according to the present invention.

FIGS. 2A and 2B are views for explaining a state before assembling the pin device, wherein FIG. 2A is a plan view and FIG. 2B is a front view.

FIG. 3 is an explanatory view of a pin device and an opening for the pin device;
(A) is a view of the opening of the PVC frame, (b) is a side view of the pin device, (c) is a front view of the pin device, and (d) is a plan view of the pin device.

4A and 4B are cross-sectional views of a pin device, wherein FIG.
FIG. 3B is a cross-sectional view of FIG. 3A, and FIG. 3B is a cross-sectional view of FIG.

FIG. 5 is a view showing a state in which a seal is attached to the pin device P;
(A) is a plan view and (b) is a front view.

FIGS. 6A and 6B are front views showing a state in which the pin device is coupled to a PVC frame, wherein FIG. 6A is an overall view and FIG.

7A and 7B are views for explaining a method of connecting the pin device and the PVC frame, wherein FIG. 7A is a perspective view before connection and FIG. 7B is a perspective view of a main part immediately before connection.

FIG. 8 is a plan sectional view of FIG. 1;

FIG. 9 is a partially cutaway front view of a prefabricated refrigerator-freezer composed of heat insulating panels having different thicknesses.

FIG. 10 is a front view of the pin device and the hook device in FIG. 9;

FIG. 11 is a perspective view of a prefabricated refrigerator including a refrigerator compartment and a freezer compartment.

FIG. 12 is a front view of a hook device and a conventional pin device including one pin.

FIG. 13 is a front view of a hook device and a conventional pin device including two pins.

14 is a view of the pin device shown in FIG. 13, (a) is a front view, and (b) is a plan view.

[Explanation of symbols]

 F hook device P pin device 51 pin support case 53 hook entry opening 67 first pin 69 gas vent hole 91 face material 93 heat insulating material 97,99 heat insulating panel 98,100 heat insulating floor panel 102 wood screw (second pin)

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F25D 23/06

Claims (1)

(57) [Claims] 1. A hollow panel is formed by a pair of face members facing each other at an interval, and a pin device or a hook device is disposed in a gap around a peripheral portion of the hollow panel. In a pin device for an assembling heat insulating box for interconnecting heat insulating panels formed by injecting and foaming a heat insulating material into an internal space, a pin supporting case made of synthetic resin having a hook entry opening formed on one surface is provided. The pin support case is provided with a first pin for connecting the adjacent heat insulating panel when the adjacent heat insulating panel is placed on the floor panel of the same height. It is formed to connect with the adjacent heat insulation panel when the panel is placed on the floor panel of different height, the inner diameter is smaller than the outer diameter of the first pin, and a vent hole for inserting a wood screw is provided. Assembly insulating box-body pins and wherein the being.